D model as in 301d? If so that's right under a 301b. But that's still a little conflicting on there part because I asked them specifically about the spectrum x and they said it's the z model. There are a few other companies that sell the same light also. Sundopt on Alibaba makes them.
I was looking at the site but didn't see it mention lm301h diodes being in the unit. If I may ask, where did you see that. Nice flowers though and your setup is noice. I actually messaged them and they said it has Samsung 301z.
I use pure uv from agromax.
https://www.htgsupply.com/products/agromax-pure-uv-t5-bulb-4-foot/
Has uvb lower than the uv diodes which are around 385 nm. The pure goes down to 285nm which is what experts says increases thc, resin production and so on. Have noticed increase trichs and and heavier...
Experimentation has a tendency to dim lights sometimes. What we must not do is let that light go out. That was a learning experience that will last you a lifetime.😂😭😂